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    Subject[PATCHv3 12/13] acpi/hmat: Register memory side cache attributes
    Date
    Register memory side cache attributes with the memory's node if HMAT
    provides the side cache iniformation table.

    Signed-off-by: Keith Busch <keith.busch@intel.com>
    ---
    drivers/acpi/hmat.c | 32 ++++++++++++++++++++++++++++++++
    1 file changed, 32 insertions(+)

    diff --git a/drivers/acpi/hmat.c b/drivers/acpi/hmat.c
    index 45e20dc677f9..9efdd0a63a79 100644
    --- a/drivers/acpi/hmat.c
    +++ b/drivers/acpi/hmat.c
    @@ -206,6 +206,7 @@ static __init int hmat_parse_cache(union acpi_subtable_headers *header,
    const unsigned long end)
    {
    struct acpi_hmat_cache *cache = (void *)header;
    + struct node_cache_attrs cache_attrs;
    u32 attrs;

    if (cache->header.length < sizeof(*cache)) {
    @@ -219,6 +220,37 @@ static __init int hmat_parse_cache(union acpi_subtable_headers *header,
    cache->memory_PD, cache->cache_size, attrs,
    cache->number_of_SMBIOShandles);

    + cache_attrs.size = cache->cache_size;
    + cache_attrs.level = (attrs & ACPI_HMAT_CACHE_LEVEL) >> 4;
    + cache_attrs.line_size = (attrs & ACPI_HMAT_CACHE_LINE_SIZE) >> 16;
    +
    + switch ((attrs & ACPI_HMAT_CACHE_ASSOCIATIVITY) >> 8) {
    + case ACPI_HMAT_CA_DIRECT_MAPPED:
    + cache_attrs.associativity = NODE_CACHE_DIRECT_MAP;
    + break;
    + case ACPI_HMAT_CA_COMPLEX_CACHE_INDEXING:
    + cache_attrs.associativity = NODE_CACHE_INDEXED;
    + break;
    + case ACPI_HMAT_CA_NONE:
    + default:
    + cache_attrs.associativity = NODE_CACHE_OTHER;
    + break;
    + }
    +
    + switch ((attrs & ACPI_HMAT_WRITE_POLICY) >> 12) {
    + case ACPI_HMAT_CP_WB:
    + cache_attrs.write_policy = NODE_CACHE_WRITE_BACK;
    + break;
    + case ACPI_HMAT_CP_WT:
    + cache_attrs.write_policy = NODE_CACHE_WRITE_THROUGH;
    + break;
    + case ACPI_HMAT_CP_NONE:
    + default:
    + cache_attrs.write_policy = NODE_CACHE_WRITE_OTHER;
    + break;
    + }
    +
    + node_add_cache(pxm_to_node(cache->memory_PD), &cache_attrs);
    return 0;
    }

    --
    2.14.4
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